<template>
  <div class="wrapper">
     <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
         <el-alert
            title="添加商品信息"
            type="info"
            show-icon
            center>
        </el-alert>
        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- tabs标签页 -->
        <el-form :model="addForm" :rules="addFormRules" ref="formRef" label-position="top">
            <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="changeTab">
                <el-tab-pane label="基本信息" name="0">
                   <el-form-item label="商品名称" prop="goods_name">
                      <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                      <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                      <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                      <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                          <el-cascader
                          expand-trigger="hover"
                          :options="cateList"
                          :props="cateProps"
                          v-model="addForm.goods_cat"
                          @change="handleChange">
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                   <el-form-item :label="item.attr_name"  v-for="(item) in manyData" :key="item.attr_id">
                          <el-checkbox-group v-model="item.attr_vals"   >
                            <el-checkbox :label="val" v-for="(val,i) in item.attr_vals" :key="i" border></el-checkbox>
                          </el-checkbox-group>
                   </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name"  v-for="(item) in onlyData" :key="item.attr_id">
                         <el-input v-model="item.attr_vals"></el-input>
                   </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                            <el-upload
                            :headers="headerObj"
                              :action="url"
                              :on-preview="handlePreview"
                              :on-remove="handleRemove"
                              :on-success="uploadSuccess"
                              list-type="picture">
                              <el-button size="small" type="primary">点击上传</el-button>
                            </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                   <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                   <el-button type="primary" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 预览图片对话框 -->
        <el-dialog
        title="图片预览"
          :visible.sync="imgVisible"
          width="50%"
          >
         <img :src="imgPreview" alt="" class="imgpre">

        </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '1',
        goods_price: '1',
        goods_number: '1',
        goods_weight: '1',
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []

      },
      url: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token-cli')
      },

      manyData: [],
      onlyData: [],
      imgVisible: false,
      imgPreview: '',
      // 分类数据
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 验证规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请输入商品分类', trigger: 'blur' }]
      }
    }
  },
  mounted () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$axios.get('categories')

      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeLeave (newActive, oldAvtive) {
      if (oldAvtive === '0' && this.addForm.goods_cat.length !== 3) {
        return false
      }
    },
    async  changeTab (event) {
      if (event.name === '1') {
        const { data: res } = await this.$axios.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        res.data.forEach(e => {
          e.attr_vals = e.attr_vals.length === 0 ? [] : e.attr_vals.split(' ')
        })
        this.manyData = res.data
      } else if (event.name === '2') {
        const { data: res } = await this.$axios.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        console.log(res)
        this.onlyData = res.data
      } else if (event.name === '3') {

      }
    },
    handlePreview (file) {
      console.log(file)
      this.imgPreview = file.response.data.url
      this.imgVisible = true
    },
    handleRemove (file) {
      console.log(file)
      const tem = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(e => e.pic === tem)
      this.addForm.pics.splice(i, 1)
    },
    // 上传成功时的钩子函数
    uploadSuccess (res) {
      const picInfo = {
        pic: res.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
    },
    add () {
      this.$refs.formRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('表单数据不合法')
        }
        const form = JSON.parse(JSON.stringify(this.addForm))
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyData.forEach(item => {
          const info = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(info)
        })
        // 静态属性
        this.onlyData.forEach(item => {
          const info = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.push(info)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$axios.post('goods', form)

        if (res.meta.status !== 201) {
          return this.$message.error('商品添加失败')
        }
        this.$message.success('商品添加成功')
        this.$router.push({ path: '/goods' })
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-steps {
  margin:  20px 0;
}
.el-checkbox {
  margin: 0 10px 10px 0 !important;
}
.imgpre {
  width: 100%;
}
.el-button {
  margin-top: 30px;
}
.quill-editor /deep/.ql-container {
  min-height: 300px;
}
</style>
